Home
Class 11
PHYSICS
An ambulance blowing a siren of frequenc...

An ambulance blowing a siren of frequency 700Hz is travelling slowly towards vertical reflecting wall with a speed 2m/s. The speed of sound is 350m/s. How many beats are heard per sec to the driver of the ambulance?

A

6

B

7

C

8

D

9

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • WAVE MOTION

    DC PANDEY|Exercise Matrix Matching|16 Videos

  • VECTORS

    DC PANDEY|Exercise Medical enrances gallery|9 Videos

  • WORK, ENERGY & POWER

    DC PANDEY|Exercise Level 2 Comprehension Based|2 Videos

Similar Questions

Explore conceptually related problems

An ambulance blowing a siren of frequency 700 Hz is moving with a speed of 2m/s towards a vertical wall. The speed of sound is 352 m/s. Then the frequency of the reflected sound as heard by the driver of ambulance would be

An ambulance sounding a horn of frequency "264Hz" is moving towards a vertical ,wall with a velocity of "5ms^(-1)" .If the speed of the sound is "330ms^(-1)" ,how many beats ,per second will be heard by an observer standing a few meters behind the ambulance?

A car, sounding a horn of frequency 1000 Hz, is moving directly towards a huge wall at a speed of 15 m/s. If speed of sound is 340 m/s, then the frequency of the echo heard by the driver is

A source of sound of frequency 500 Hz is moving towards an observer with velocity 30 m/s . The speed of sound is 330 m/s . the frequency heard by the observer will be

A car with a horn of frequency 620 Hz travels towards a large wall with a speed of 20 ms ^(-1) velocity of sound is 330 ms ^(-1) The frequency of echo of sound of horn as heard by the driver is

An ambulance fitted with a siren of v = 400 Hz is going towards a vertical wall at a speed of 54 km/hr. A person standing on the road, behind the ambulance, listens to the siren sound coming from the ambulance as well as that coming after reflection from the wall. Calculate the apparent frequency of the sound wave (a) directly coming from the siren to the person, and (b) coming after reflection from the wall Take, speed of sound = 340 m/s

A siren emitting sound of frequency 500 Hz is going away from a static listener with a speed of 50 m / sec . The frequency of sound to be heard, directly from the siren, is

As shown if Fig. a vibrating tuning fork of frequency 512 Hz is moving towards the wall with a speed 2(m)/(s) . Take speed of sound as v=340(m)/(s) and answer the following questions. Q. If the listener, along with the source, is moving towards the wall with the same speed i.e., 2(m)/(s) , such that the source remains between the listerner and the wall, number of beats heard by the listerner per second will be